Gas-heated washboiler, boiling-pan, and the like.



APPLICATION FILED SEPT. 4, I9I3.

Patented Apr. 25, 1916.

mwa,

THE COLUMBIA PLANOGRAPH co.. WASHINGTON. D. c.

rin'rria srars ra'rnnr LEE SCI-IOFIELD, 0F LYT-IAM, ENGLAND, ASSIGNR OFONE-HLF TU JAMES STOTT, 0F OLDHAIIVI, ENGLAND.

GAS-HEATH() WASHBOILEEL, BOILING-PAN, AND THE LIKE.

meines.

Application filed September 4, 1913.

To all w kom t may concern Be it known that I, Lun SoHo'FInLD, a subjectof the King of Great Britain, residing at Lytham, Lancashire, England,have invented certain new and useful Improvements in Gas-HeatedWashboilers, Boiling- Pans, and the like, of which the following is aspecification.

My invention relates to that class of boiler or water heater in which afloat is employed for determining the degree ot flame forming theheating medium. In such apparatus either the float is immersed. in theliquid contained within the boiler or such 'float formed the cover withits wall dipping into an annular vessel surrounding the upper part ofthe apparatus, which vessel was completely isolated from the boiler. lneither case the float was directly connected by suitable appliances tothe burner and the rising and falling oi the float determined the degreeof llame issuing from the burner and so regulated the heat to theboiler, the connection between the burner and the float being such thatthe lioat could not be moved without in some way actuating the burnerand further the apparatus was inadmissible as a washing boiler becausein one instance the float was in the way and in the other the boiler wasnot contained within the float but was at a lo-wer level the chamberpositioned within the oat constituting a steam chamber in which thematerial was steamed only and further the material could not beinspected because of the construction of the float unless it was removedand the loat could not be easily removed because of the suction of thesteam within the chamber holding the float tightly.

Now the object of my invention is to construct such a boiler or boilingpan or the like for use with gas stoves or gas burners in such a mannerthat the float is free and the lever or appliances connected with thegas valve and which is or are operated by the float can be moved free ofthe float if desired, and to provide a lid to the float or boiler sothat the contents or' the boiler' can be easily examined during theboiling opera tions.

Figure 1 is a` transverse vertical section of an apparatus embodying the`features of the invention. Fig. 2 is a similar view showing amodification of the invention. Fig. 3 is a. similar view showing afurther Specification of Letters Patent.

.Patented Apr.. 25, little.

Serial No. 788,124.

modification of the invention. Fig. 4 is an elevation of a portion ot aheating apparatus showing the boiler or receptacle in section and thefeatures of the invention applied thereto. Fig. 5 is a detail view of astill further modification relating to means tor operating the floatwhen the cover is open.

The wash boiler or pan a is inserted in a metallic or other ring o, seeFig. l, to form with the boiler or pan a. deep annular space 0. rllhecover d of the boiler or pan is provided with a deep Flange e from ornear the outer edge and which is inserted in said space c, to provide abell or float which rises and falls in the said annular space c. Theobject in constructing the annular space is to provide means for keepingthe float or bell clear of the contents of the boiler or pan and thusprevent any interference with the `floats movements. At the top of orover the float or bell thus formed is provided an attachment or lever jloosely resting thereon for operating a valve 7L on the gas service pipeto regulate the supply of fuel or gas supply after the manner of anordinary gas valve directly the water or liquid boils suili ciently toraise the float or bell by its own vapor expansion properties. The coverCZ is provided with a hinged lid al which forms part of the cover and asuitable type ot' catch may be fitted to the float or bell to keep itair tight when the lid is closed.

lt may be that instead of employing a hinged lid on the float or bell olthe boiler, a lid working in a suitable lateral slide could be used withgreater convenience. As an alternative to a 'float or bell coveringpractically the whole of the pan portion of the boiler, a comparativelysmall float or bell d, c, is used in conjunction with a comparativelysmall chamber t' for securing freedom of action and isolation 'from theclothes as shown by Fig. 2. This chamber i may be in the nature of anopen ended tube 7' having solid or perforated walls and effectivelysupported from the top of the boiler a, while the other end ispositioned upon or almost upon the bottom of the pan or it may be formedof a curved piece of metal soldered or attached permanently to the wallof the pan a or it may be just loosely supported from the top as shownby Fig. 3, the wall of the pan forming the remaining portion of thechamber.

Although the lever f is suggested for conveying the float movements tothe valve- /L it may be dispensed with by supporting the valvetvdirectly over or above the bell or float d, e, as shown by Fig. 3.

It is preferred tov use lever f with a loose end resting upon the'floatsince by merely raising or vmoving the lever sidewise the vioat can beremoved and cleaned if found .supply'for a brief time. In case thistemporary restrictionv of the gas toy the burner p be found troublesomeya push piece or finger le, Figs. 2' and 3, is placed on the boiler lid.By means o-f this when the lid is openand thrown back the Heat is held ydown, compression increased and the air underneath' the float quickly oralmost instantaneously liberated.-

If found necessary asmall spring valve L may be brought into use asshown by Fig.

y5, lthe push piece orfinger h2 beingv arranged to press the valve fromits seating and thereby pass the' imprisoned air to atmosphere.

In the case of pans or boiling vessels used on gas stoves or gas rings,the attachment to the gas regulating valve may differ somewhat to thatfor the ordinary wash boiler forclothes. For instance, it may be foundconvenientito use a vertical spindle or rod resting at its lower end vonthe top of the bell or float d, e, Fig'. 4l, and the other attached toa'diaphragm or other type of gas -valve with a` suitable swivel joint myat some point of the spindle orrod for moving the rod out of the wayinorder (see dotted lines)v to lift the float or bell to examine thecontents ofthe pan fromtime to time. In this case the floatbeing smallit can easily be lifted out of the vessel a but for ready During laccess to the contents of the pan a I may provide a lip or small door asd hinged to the top of the float as in Fig. l and be held in position bya spring.

What I do claimv as my invention and desire to secure by Letters Patentis 1. The combination with a boiling receptacle and heating meanstherefor having a valve means, of a chamber formed as a part of thereceptacle, a lioat movably mounted in said chamber and movedimmediately the liquid in the receptacle gives off a steam vapor insufficient volume to counteract the cool influence of the exposedsurface of the float, and means in part loosely resting upon andengaging the valve means of the heating means and operated by the upperpor tion of the fioat and exterior of the receptacle for controllingsaid heating means proportionately to the movement of the lioat.

2. The combination with a boiling receptacle and heating means therefor,of a chamber formed as a portion of the receptacle, a float movablymounted in said chamber and inclosed within the chamber to avoid contactwith the contents of the receptacle, the said lioat having a movablecover exposed exteriorly of the chamber, and means controlled by themovement of the cover to engage a portion of the heating means forregulatinghthe degree of heat orthe supply of the heating medium to thereceptacle.

3. The combination with a boiling receptacle, of a float movablydisposed in the receptacle and separated from the containing portion ofthe latter toavoid contact with the contents of the receptacle, thefioat being provided with a movable cover, heating means for thereceptacle, and a device'connected to a portion of the heating means forcontrolling the supply of heating medium to the receptacle and looselyengaging the said cover.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

LEE SCHOFIELD.

Copies'of this patent may he obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

